CRL 3/8" Closed Cell Backer Rod - 3600' Case Glass Lifters & Accessories The black color helps to

The black color helps to disguise the backer rod in certain joint applications

or any fine abrasive that will pass through a 30 to 100 mesh screen

TECHNICAL DATA: Meets or exceeds Federal Specifications TT-S-1543A

*Do not thin glazing compound

CRL 3/8" Closed Cell Backer Rod - 3600' Case Glass Lifters & Accessories The black color helps toAllows Easy Control of Sealant Application Thickness Won't Adhere to Sealants; No Bond Breaker Needed Compatible with All Cold Applied Sealants Preferred for Exterior Installations Where a More Positive Seal is Required CRL Closed Cell Backer Rod is a round, flexible, closed cell polyethylene foam with an exterior "skin" used as a backing and thickness control device for elastomeric and other cold applied sealants. The Backer Rod becomes an integral